Looking Glass Studios released the sequel to Thief in 2000. Utilizing the same DARK engine that powered the original Thief, Thief II had an almost identical look and feel, with only minor graphical and programming improvements. The basic gameplay was also fundamentally similar to the original Thief, but many new elements had been added, including technological gadgets such as a remote eye camera. Other changes include an increase in the number of A.I. behaviors, and the addition of female guards and soldiers. Responding to criticisms of the original Thief, the missions in Thief II were designed much more around typical thief-like behavior, and much of the game is spent robbing the rich denizens of the City rather than battling monsters. In fact, the player encounters almost none of the monsters from the original Thief except for burrick heads mounted as trophies in some of the mansions, and a few zombies and apparitions.
Please keep in mind that DDFIX is for Thief 2 1.18 and is not necessary if you upgrade Thief 2 to the NewDark Unofficial patch. This is kept here in case there's something very specific you're trying to achieve that NewDark doesn't support or if you refuse to upgrade to NewDark Thief 2. Quick Explanation: “DDFix is a patch (created by TimeSlip) to allow Dark Engine games to run properly on modern hardware. It fixes the numerous problems introduced in modern graphics card drivers, as well as enabling 32-bit rendering to increase visual quality beyond even the original game.” – Nameless Voice’s ddfix thread. One important point to make: ddfix enables a multi-core fix if you’re using a dual-core processor.